Neither. It is not realistic to think you can handle a "massive" number (ie. more than about 20) of clients in a single-threaded environment.
If you really insist, use BlitzMAX as there is a chance you'll get multithreading down the line. But if you want to be certain, go for C#.
BlitzMAX also has several other advantages over BlitzPlus. It's object oriented, like SOS said, and the compiler is an order of magnitude better. But for an MMOG? Get another language.
If you really insist, use BlitzMAX as there is a chance you'll get multithreading down the line. But if you want to be certain, go for C#.
BlitzMAX also has several other advantages over BlitzPlus. It's object oriented, like SOS said, and the compiler is an order of magnitude better. But for an MMOG? Get another language.